Heavy duty scraper



Nov. 5, 1940.

' u. M. IBROIDERSEN HEAVY mm SCRAPER Filed Feb. 11. 1939 6 Sheets-Sheet1 mm G. a fl |MH.|||. "n as u" m N. I x. m. g 3 WI r 0 R 1. 3 m6 r w m"ax i m n .1 mm L.

Nov. 5, 1940. M. M. BRODERSEN.

mm wry- SCRAPER Filed Feb. 11 1939 6 Sheets-Sheet 2 O 9 M. M. BRODERSEN73 HEAVY DUTY SCRAPER Filed Feb. 11, 1939 6 Sheets-Sheet 3 1940- M. M.BRODERSEN 2.2 0. 7

HEAVY DUTY SCRAPER Filed Feb. 11. 1939 e Sheets-Sheet 4 Nov. 5, 1940- M.M. BRODERSEN HEAVY DUTY SCRAPER Filed Feb. 11. 1939 6 Sheets-Sheet 6 SVQN wig grwm Patented Nov. 5, 1940 UNITED STATES PATENT OFFICE TheSlusser-McLean Scraper Company, Sidney,

Ohio, a corporation of Ohio Application February 11, 1939, Serial No.255,885

8 Claims.

This invention relates to tractor drawn power controlled scrapers of thefront-end dumping type, having an apron at the front end to. prevent theloaded earth from sliding out of said end is when it is being carried.

The primary objects of my invention are to provide a bowl in which theside, members form an integral partof the frame structure and the bottomand back of said bowl comprise a separate unit interposed between theside members and supported thereon near the forward'edge of said bottomon longitudinally movable pivots. The back of the bowl being arrangedfor vertical movement effected by cable power means: so

15 that for dumping the load the back of the bowl is raised verticallythereby moving the front edge of the bottom rearwardly consequentlytilting said ttom and causing the earth to slide oil.

Thusdarger loads may be handled more efii- 20 ciently and whereby fasterdumping is effected with less power than has heretofore been possible.

I have also mounted and arranged the apron in connection with the bowlso that in the scraping and loading operation said apron may be 25partially lowered to act asa shoe for spreading evenly and tamping downthe scraped earth as it accumulates in front of the bowl, so that auniform volume of the earth enters said bowlthus effecting a smooth andeven loading and thereby 30 eliminating the resultant traction powersurges when loading uneven amount of earth. v

With these and other objects in view the invention consists in thecombination, correlation and construction of parts, members and featureswhich will be described in the specification and will be finally pointedout in the claims.

Referring to the drawings:

Figure l is a plan view of the scraper embodying my invention.

Figure 2 is a side elevation of the scraper in the digging position.

Figure 3 is a side elevation of the scraper in the transporting or dirtcan'ying position.

Figure 4 is a sectional elevation on line l| in Figure 1 of the scraperin the load dumping and spreading position.

Figure 5 is a rear end elevation of the scraper.

Figure 6 is a section on line 6-6 in Figure 2 illustrating details ofthebowl construction.

Figure 7 is a diagram showing the cable arrangement for operating thebowl and apron.

Figure 8 is a diagram showing the lifting cable arrangement.

Referring to Figures 1 to 8 inclusive:

The invention exemplified by the preferred form in the accompanyingdrawings includes a hinged frame comprising a forward section I and arear section 2. The forward frame section I consists of a pair of spacedapart side arms 3 rigidly connected at the forward ends to a cross 5member 4 which in turn has centrally interposed between the endsthereof, a forwardly extending and downwardly depending leg 5,swivelably supported, as at 5, on a wheeled carriage l which is adaptedfor connection to the draw bar of a 0 tractor. The rear frame section 2comprises a pair of spaced apart side plates 8 having a generallypentagrammatic contour. The side plates 8 are rigidly connected at theupper forwardly extending ends to a round tubular cross member 9, and atthe upper and lower edges near the rear ends to cross members I 0 and II respectively.

The rear ends of the plates 8 are supported, as at I2, on axle I3 of therear wheel carriage I4.

The front and rear frame sections I and 2 are hinged together by meansof pins I5. The pins I5 are secured at one end to the plates 8 and atthe other end are supported in brackets I6 formed in the reinforcingmembers I! which extend rearwardly along the upper edge of the plates 8.The rear ends of side arms 3 are interposed between plates 8 andbrackets I6 and are pivoted on the pins I5.

' Side arms 3 are provided with upwardly extending brackets I8 connectedat the upper end thereof to a. tubular cross member I9, which in turn,has secured thereto intermediate its ends a set of five spaced apartears 20. The ears 20 are ,dnclined vertically and forwardly and carry atthe ends thereof a shaft 2I which in turn, carries four sheaves 22journaled thereon in an interposed relation between said ears 20.

The tubular cross member 9, between the forward ends of plates 8, hassecured thereto intermediate its ends a set of four spaced apart ears23. The ears 23 are inclined upwardly and forwardly and carry at theends thereof a shaft 24, which in turn, carries journaled thereon threesheaves 25 interposed between said ears 23. A cable 26 anchored ordead-ended as at 21, is reaved between three of the sheaves 22 and twoof the sheaves 25 and is then passed under a sheave 28 journaled in cars29 on the cross member 4, over a sheave 30 journaled in ears 3I on theleg 5, passed through-a swiveled sheave 32 and connected to a suitablepower controlled device on the tractor. See cable diagram in Figure 8.

By pulling and releasing the cable 26 vertical swinging movement isimparted to the rear frame SQQUOH 3 about the axle of the rear wheeledcarriage i4, thereby raising and lowering the implement.

A bowl 33 is deposed between the side plates 5 with clearance relationthereto and comprises a bottom 34 having a blade 35 at the forward edgeand a back 36 at the rear thereof. The bowl structure being reinforcedby bracing webs 31 at the sides thereof. The side plates 9 serve asearth retaining members for the bowl. The bowl 33 is supported at itsfront end on rollers 39 which. are journaled on pins 39 secured to thewebs 31 and adapted to roll in slots 40 in the side plates 9. The rearend of the bowl 33 is supported from the rear frame section on suitablecable means which will be described hereinafter.

The axle l3 of the rear carriage i4 is of a square cross sectionthroughout its central portion between the wheels and-has amxed to theupper side thereof a bracket 4|. A pair of spaced apart V shaped bracingmembers 42 are disposed in the vertical plane and bolted at the apex tobracket 4|, as at 43. The lower arm 44 of each bracing member 42 issecured to the cross member H and the upper arm 45 to the cross memberII). A pair of brackets 46 extend upwardly from the upper arms 45 of thebracing members 42 and carry interposed between the upper ends thereof atubular header 41 provided with four spaced apart lobes 48 which inclineforwardly and carry interposed there between three sheaves 49 journaledon shaft 50. The brackets 46 are reinforced by side braces 51.

Secured to the back 36 of the bowl 33, near the bottom thereof, are fourspaced apart lobes 52 carrying interposed there between 3 sheaves 53journaled on the shaft 54. Also secured to the back of the bowl 33, nearthe bottom at each side thereof, is a lug 55 having at its outer end aroller 56 journaled on a pin 51. Each roller 56 is adapted to engage avertical channel 58 secured to the inner side of each side member 9. Thereceiving end of the bowl 33 is provided with an apron or closure 59comprising a bottom 60 in which part of the surface is substantiallyhorizontal, when viewed in the closed position, then sloping upwardlytoward the front for a portion of its surface and then sloping upwardstoward the rear for the balance of its surface. See Figure 3. A pair ofarms 61 are provided at the sides of the apron which extend rearwardlyalong the outside of side plates 6 with clearance relation thereto andare pivoted at the ends on the pins l5. The bottom 60 is also providedwith earth retaining side members 62 which over-lap the side plates 8inwardly thereof with clearance relation thereto. Another bottom 63 isinserted in the apron 59 for reinforcing purposes. The apron 59 isprovided with a pair of forwardly extending lobes 64 which carryinterposed therebetween a sheave 65 journaled on shaft 66.

A cable 61 anchored as at 66 on the back 36 of bowl 33 is reaved betweenthe sheaves 49 and 53, and passed over a sheave 22 on cross member l9and sheave 25 on the cross member 9 then passed under sheave 65 on theapron 59,'over a sheave 69 journaled in ears 16 on cross member 4 andsheave 1| journaled in ears 12 on the leg 5 and then passed through theswiveled sheave 13 to be connected to the drum of a suitable powercontrolled device on the tractor. See cable diagram in Figure '7.

The apron and bowl operate as follows:

Assuming that the implement is in the load carrying position as shown inFigure 3 and it is desired to dump the load, a pulling force is exertedon cable 61 which causes the apron to raise, first by virtue of the factthat it is lighter in weight than the bowl and offers less resistance tothe pull. After the apron has come to rest against the cross member 9,as shown in Figure 4, further pull on cable 61 raises the back of thebowl 33 vertically, by virtue of the guiding rollers 56 in channels 53,causing the blade end of the bowl to recede rearward in a substantiallyhorizontal plane by virtue of the guiding rollers 36 and slots 40 inside plates 9. This movement causes the bottom 34 to tilt as shown inFigure 4 thereby discharging the load. Upon releasing cable 61 the bowlis returned to the digging position by gravity, as shown in Figure 2.After the bowl comes to a stop by virtue of the guiding rollers 56resting on the cross member ll further releasing of the cable lowers theapron 59. I

It is preferred to keep the apron in substantially the position shown inFigure 2 for digging so that a narrow gap is maintained between theblade 35 and the lower edge of the apron, to

permit a restricted amount of earth to enter the bowl. The apron thenacts as a shoe to spread evenly and tamp down the scraped up earthaccumulated in front of the bowl, thus effecting a uniform loading andeliminating the power surges resultant in loading uneven amounts ofearth.

Having thus described my invention I claim:

1. An earth moving machine comprising a front frame section havingopposite side elements, a running gear unit supporting the forward endof said frame section, a rear frame section having opposed side plates,a running gear supporting the back end of said rear section, pivotalmeans connecting said side elements to said side plates for verticalmovement relative to the ground surface, power means for impartingvertical swinging movement to said rear frame section, a bowl comprisinga bottom and back rigidly associated with each other and disposedbetween said side plates, means supporting the front end of said bottomon the side plates for movement in the longitudinal plane, meansassociated with said back and said rear frame section for impartingvertical movement to said back and thereby cause the front end of saidbottom to move longitudinally thus tilting said bottom, a closure forthe'end of said bowl.

2. In a dirt moving machine, the front frame structure having oppositeside elements, a rear frame structure having side plate memberspivotally connected to the side elements of the front frame structurefor vertical movement, a front running gear unit supporting the forwardend of said front frame structure, a rear runninggear unit supportingthe rear end of said rear frame structure, means associated with saidframe structures for raising and lowering said rear frame structure, ascraper bowl comprising a bottom and a back rigidly associated togetherand disposed between said side plates with clearance relation thereto,said side plates being side closures for said bowl, a closure for thefront end of said bowl, means for connecting the front end of said bowlbottom to said side plates for longitudinal movement, means connectingthe back of said bowl to said side plates for vertica1 movement, powermeans associated with said bowl closure, said rear frame section andsaid bowl for actuating said bowl closure and for imparting verticalmovement to the back of said bowl thereby causing longitudinal movementof the front edge of said bowl bottom thus tilting said bowl.

3. Ina power scraper a front frame structure having opposite sideelements, a rear frame structure having side plate members pivotallyconnected to the side elements of the front frame structure for verticalmovement relative to the ground surface, a front running gearunitnsupporting the forward end of said front frame structure, a rearrunning gear unit supporting the rear end of said rear frame structure,means associated with said frame structures for raising and loweringsaid rear frame structure, a scraper bowl comprising a bottom and a backintegrally associated with each other and disposed between said sideplates with clearance relation thereto, said side plates being sideclosures for said bowl, a closure for the front end of said bowl, meansfor connecting the front end of said bowl bottom to said side plates forlongitudinal movement,

means connecting the back of said bowl to said side plates for verticalmovement, means associated with said bowl closure, said rear framesection and said bowl for actuating said bowl closure and for impartingvertical movement to the back of said bowl thereby causing longitudinalmovement of the front edge of the bowl bottom.

4. In a power scraper comprising a frame structure supported at bothends thereof on running gear units and arranged for vertical movementwith relation to the ground surface, a scraper bowl comprising spacedapart side elements attached to said frame structure, a bottom providedwith a back rigidly connected at the rear thereof and disposed betweensaid side elements with clearance relation thereto, means connecting thefront end of said bottom to the said side elements for longitudinalmovement relative to said side elements, means for connecting the backto the side elements for vertical movement relative thereto, power meansfor imparting vertical movement to said back thereby causinglongitudinal movement of the front edge of said bottom.

5. In a power scraper comprising a frame structure supported at bothends thereof on running gear units and arranged for vertical movementwith relation to the ground surface, a bowl comprising spaced apart sideelements attached to said frame structure, a bottom having rigidly,attached thereto a back at the rear and a scraper blade at the frontthereof disposed between said side elements with clearance relationthereto, means connecting the front of said bottom to the side elementsfor longitudinal movement with respect to said side elements, means forconnecting the back to the side elements for vertical 'movements withrespect to said side elements,

power means for imparting vertical movement to said back and therebycausing longitudinal movement of the front of said bottom thus tiltingthe bottom.

6. In a power scraper comprising a framestructure supported at both endsthereof on running gear units and arranged for vertical movement withrelation to ground surface, a scraper bowl comprising spaced apart sideelements attached to said frame structure, a bottom provided with a backrigidly connected at the rear thereof and disposed between said sideelements with clearance relation thereto, slidable means connecting thefront end of said bottom to the side elements for longitudinal movementrelative thereto, slidable means for connecting the back to the sideelements for vertical movement relative'thereto, power means forimparting vertical movement to said back and thereby causinglongitudinal movement of the front edge of said bottom thus tilting saidbottom.

7. In a. power scraper comprising, a frame structure supported at bothends on running gear units and arranged for vertical movement withrelation to the ground surface, a bowl comprising spaced apart sideplates attached to said \frame structure, a bottom and a back integrallyassociated with each other and disposed between said side plates withclearance relation thereto, longitudinally slidable means supporting thefront end of said bottom on the side plates, vertically slidable meansconnecting the lower edge of said back to the side plates, power meansassociated with the lower edge of said back and said frame structure forimparting vertical move;

ment to the back of said bowl thereby causing\ longitudinal movement ofthe front edge of said K bottom thus tilting the bottom.

8. In a power scraper comprising, a front frame structure havingopposite side elements, a rear frame structure having slide platemembers pivotally connected to the side elements of the front framestructure for vertical movement relative to the ground surface, a frontrunning gear unit supporting the forward end of said front framestructure, a rear running gear unit supporting the rear end of said rearframe structure, power means associated with said frame structures forraising and lowering the rear frame structure, a scraper bowl comprisinga bottomand back integrally associated with each other and disposedbetween said-side plates with clearance relation thereto, said sideplates being side closures for said bowl, a closure for the front end ofsaid bowl, longitudinal slots near the bottom of said side platemembers, rollers at the forward corners of said bottom engaging saidslots, vertical channels near the rear of said side plate mambers,rollers at the lower comers of said back' engaging'said channels, powermeans associated with said bowl closure, said rear frame section andsaid bowl for actuating said bowl closure and for imparting verticalmovement to the back of said bowl thereby causing longitudinal movementof the front of the bowl bottom thus tilting said bowl.

MAX M. BRODERSEN.

